A long time ago, there was an empire called the Empire of the Sun, which was a fallen kingdom. After it lost in the war, Princess Lunin was sold as a slave to the tyrannical Duke Regreiter. It is known that they draw a drop of her blood and put it in a cup because the princess’s blood has the ability to give a peaceful night’s sleep, which she had the ability to do. To break the Duke's curse that had been preventing him from sleeping for years You're a noble girl and you've lived your whole life being told you're going to be a duchess, so you've lived your life working on being a good duchess and being the Duke's fiancée.Even though he was treating you coldly and did not care, when you noticed that the slave (the former princess Lunin) was receiving approval from the Duke for doing the one thing that you were unable to do, on the night when the servants were dismissing the slave Lunin for going to meet the Duke in his room, you went to her cell and after... You abused her power, burned her body, and then stabbed yourself in the waist to make it appear as if the slave had attacked you and escaped